Manifold silencer



Jan. 9, 1951' a URNE ETAL 2,537,203

MANIFOLD SILENCER Original Filed May 5, 1945 2 Sheets-Sheet l 47 Roland B. Bourne 8;

7 Arfhur E. Chase INVENTORS BYM ATTOR Y 1951 R. B. BOURNE ET AL 2,

MANIFOLD SILENCER Original Filed May 5, 1945 2 Sheets-Sheet 2 Fig.|3

Roland B. Bourne & Arfhur E. Chase INVENTORS ATTOR EY Patented Jan. 9, 1951 UNITD STATES FATENT OFFICE MANEFU'LB SILENCIER {)riginal appiicaticn May 5, 19

Serial No.

592,196. Divided and this application November 3.6, 1948, Serial No. 60,294

7 Claims.

This invention relat s to improvements in silencers particularly intended to be attached directly to the exhaust ports of an cor tion engine without the intervention of a fold. In other words, the silencer acts as a manifold as well as performing its usual functions. Such devices are of particular value in connection with Diesel railway locomotives, in which space is at a premium and an exhaust manifold must he used in any case. Ordinary types of silencer are not fitted for this type or work.

The present application is a division of our prior application Serial No. 592.195. filed May 5, 1945, now Patent No. 2,513,229, issued June 27, 1950.

The invention will now be described with re lation to the accompanying drawings in which:

Fig. 1 is a section, on line i--i oi" Fig. 2, of one embodiment of the invention;

Fig. 2 is a section on line 2-2 of Fig. 1;

Fig. 3 is a section, on line 3-3 of Fig. a, of a modification;

Fig. 4 is a section on line ti of Fig. 3'

Fig. 5 is a section, on line 5l of Fig. 6, of a further modification;

Fig. 6 is a section on line l3-it of Fig. 5;

Fig. '7 is a longitudinal section showing a modification of the construction shown in Figs. 1 and 2;

Fig. 8 is a section. on line 3-5 of Fig. 9, showing a further modification.

Fig. 9 is a section on line iL-d of Fig. 8;

Fig. 10 is a section, on line t y-H3 of Fig. 11, of a modification using a slanting partition:

ll ii of Fig. 19; 35

Fig. 12 is a section. on line i2-l2 of Fig. 2.3, of a modification using a conical partition; and

Fig. 13 is a section on line li -ls of Fig. 12.

In general silencers constructed accordance with the pre ent invention are ch-racte an elongated shell into one side of wpipes may enter directly from the ports engine. A longitudinal partition, whisume various forms, divides the ca chambers separated transversely t i into one of which the inlet pi er an the other of which enters one or more eicl pipes from either the side or he end of the easing depending upon the conditions under which the silencer is to be installed. One or more transfor conduits pass, in a direction approxin'i tely parallel to the axis of th cylindrical shell of the silencer, from the inlet to the exhau t chamber in such a way that the gas is not allowed to pass directly from the inlet pipes into the transfer (Cl. 181--4i)) pipes or from the latter into the exhaust pipes, so that expansion of the gas and a breaking up of the pulses occur in the two chambers.

g 1 and 2 show three inlet pipes 38 inclined within the silencer so as to discharge towards one end of the inlet chamber 39. This chamber is separated from the outlet chamber 5% by a pair of reversely curved arcuate partitions 4| and 42 extended substantially to the center of the sil ncer and joined by a lune-shaped partition 43.

ough this partition pass longitudinally disposed transfer tubes at, which may be of differing sizes as shown. The partitions 4!, 42 and 43 are preferably so disposed as to permit the transfer tubes to open into that end of the inlet chamber toward which the inlet pipes 38 are directed. An outlet pipe 45 extends longitudinally through header opening towards that end of the coast chamber into which the transfer tubes open A. modification of this structure is shown in F g. 7 which the inlet pipes M and the partitions 48. and 5d are arranged so that the transfer tubes 5! open into that end of the inlet chamber 52 toward which the inlet gases are directed. The outlet pipe however, is in this in tance positioned to open into the opposite end of the exhaust chamber from that into which the .ran fer tunes. open. Th s gives a longer gas flow in the outlet chamber and. a double reversal of fl w wh ch in some instances increases the silencing effect. The e two con tructions are of valve n reasing the permissible length of the tran fer tubes. which should he a substantial fraction of the len th of t e silencer as shown.

Figs. 3 to 6 repre ent two forms of a construction sim ar in purpo e to tho e of Figs. 1, 2 and but with the passage of the tran fer tubes from one side to the other of the partition obt d by off etting the tubes rather than the rtition. Referring first to Figs. 3 and 4, the cylindrical ca ing 53 is di ided by a longitudinally ext nding arcuate partition 54 into an inlet nicer 5 and an outlet chamber 65. Inlet pipes extend into the former chamber and outlet pipes 68 extend into the latter. A series of transfer tubes 69 are offset at an intermediate point so that they may pass through the partition and yet remain enerally parallel to the axis of the casing. In the form shown in Figs. 3 and 4 the tubes are all bent in the dir ction, while the tubes it in Figs. 5 and 6 are bent alternately in opposite directions so that the gas flow is from both ends of the inlet chamher to both ends of the outlet chamber rather than from one end of the former to one end of the latter as in Figs. 3 and 4.

A manner of forming the partition so as to avoid the necessity of using separate transfer tubes is shown in Figs. 8 and 9. In this instance the partition is formed of two oppositely curved overlapping plates H and i2 welded together where they touch. Due to the reverse curvature a passage 13 is formed between the overlapping portions of the plates, and by having the plates shorter than the casing 14 this passageway is made to open at one end into the inlet chamber 15 and at the other into the outlet chamber 15. It will be understood in this and other forms that the inlet and outlet conduits may be arranged in any desired way.

It is not necessary that the partition be arcuate as in the forms previously described. Thus in Figs. 10 and 11 the partition TI is made of a fiat sheet but is arranged on a slant so that the transfer tubes 1'8 may pass through it and remain parallel to the axis of the casing. In Figs. 12 and 13 the partition 19 is conical and the transfer tubes 80 are parallel to the axis as before. While this form is restricted to cases where the exhaust pipe "-5' one of said chambers, an outlet conduit opening into the second of said chambers, and at least one conduit extending through the central part of the partition in a direction generally parallel to the axis of the casing and openin at opposite ends into said chambers.

2. A manifold silencer comprising a generally cylindrical casing, a longitudinally extending tition within the casing dividing it into laterally adjacent chambers, a plurality of inlet conduits opening laterally of the easing into one of said "chambers, an outlet conduit opening into the second of said chambers, and at least one conduit extending through the partition in a direction generally parallel to the axis of the casing, said partition and conduit being deformed relative to each other to permit the conduit to lie parallel to 1 the axis on both sides of the partition.

3. A manifold silencer comprising a generally cylindrical casing, a longitudinally extendin partition within the casing and having an offset por tion at a point intermediate its length, a plurality of inlet conduits opening laterally of the casing 9 into one of said chambers, an outlet conduit opening into the second of said chambers, and at 4 2 least one conduit lying substantially parallel to the axis of the casing and passing through the ofiset portion of the partition. 1

4. A manifold silencer comprising a generally cylindrical casing, a longitudinally extending partition within the casing, a plurality of inlet conduits opening laterally of the casing into one of said chambers, an outlet conduit openin into the second of said chambers, and at least one conduit lying generally parallel to the axis of the casing and ofiset intermediate its length to pass through said partition.

5. A manifold silencer comprising a generally cylindrical casing, a pair of oppositely curved longitudinally extending plates secured to the interior of the casing and to each other to form a partition dividing the casing into two laterally adjacent chambers, said plates each extending from one end of the casing past a portion of the other plate part way to the other end of the easing to form between them a conduit extending in a direction generally parallel to the oi the casing through said partition and opening at opposite ends into said chambers, a plurality of inlet conduits entering one of said chambers, and at least one outlet chamber entering the other of said chambers.

6. A manifold silencer comprising a generally cylindrical casing, a longitudinally extending platelike partition inclined with respect to the axis of the casing and extending from one end to the other of the casing to divide it into two laterally adjacent chambers, a plurality of inlet conduits opening laterally of the casing into one of said chambers, at least one outlet conduit opening into the second of said chambers, and at least one conduit extending through the central part of the partition in a direction generally parallel to the axis of the casing and opening at opposite ends into said chambers,

7. A manifold silencer comprising a generally cylindrical chamber, a conical platelike partition extending longitudinally from one end to the other of the casing to divide it into two laterally adjacent chambers, a plurality of inlet conduits opening into one of said chambers, at least one exhaust conduit entering the other of said chambers, and at least one conduit extending through the central part of the partition in a direction generally parallel to the axis of the casing and opening at opposite ends into said chambers.

ROLAND B. BOURNE.

ARTHUR E. CHASE.

REFERENCES CITED Name Date Genther May 1, 1923 Number 

